243860545 has 4 divisors (see below), whose sum is σ = 292632660. Its totient is φ = 195088432.

The previous prime is 243860509. The next prime is 243860567. The reversal of 243860545 is 545068342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88284816 + 155575729 = 9396^2 + 12473^2 .

It is a cyclic number.

It is not a de Polignac number, because 243860545 - 2¹¹ = 243858497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24386050 + ... + 24386059.

It is an arithmetic number, because the mean of its divisors is an integer number (73158165).

Almost surely, 2^243860545 is an apocalyptic number.

It is an amenable number.

243860545 is a deficient number, since it is larger than the sum of its proper divisors (48772115).

243860545 is an equidigital number, since it uses as much as digits as its factorization.

243860545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48772114.

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 243860545 is about 15616.0348680451. The cubic root of 243860545 is about 624.7609069469.

The spelling of 243860545 in words is "two hundred forty-three million, eight hundred sixty thousand, five hundred forty-five".